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Osumanu Haruna Ahmed is a Professor at Universiti Putra Malaysia (UPM). He is a Ph.D holder in Soil Science, with Soil Fertility and Management at his field of specialisation. He lectures at the Faculty of Agriculture and Food Science, Universiti Putra Malaysia, Bintulu Campus Sarawak, Malaysia. Since 1998, most of his researches are related to sustainable agriculture. He has published numerous papers in his field of specialisation. He has won several awards at national and international levels. He serves as a member on a number of editorial advisory boards.
Sandytextured soil infertility poses a problem for sustainable crop cultivation. This problem is usually dealt with by the addition of chemical fertilizers, which are expensive and can cause serious environmental issues if not managed well. A better alternative to improve and manage sandy soil infertility is the use of organic amendments produced from agro-wastes. This two (2)-year field study was conducted in a sandy-textured soil grown with black pepper to evaluate mainly the effects of chemical fertilizer, fermented plant and fruit juices, compost, and biochar on soil properties and morpho-physiological characteristics and yield of black pepper. Generally, the results indicated that the combination of fermented fruit juice, compost, and biochar was comparable to and in some cases better than chemical fertilizer in terms of soil physical, chemical, and biological properties as well as crop performance. These findings were even more pronounced in the second year of measurements. There were strong positive relationships between soil N and pepper leaf chlorophyll content and between soil microbes and soil respiration. The findings showed that these soil amendments produced from agro-wastes are a good alternative to the use of chemical fertilizers on sandy soils to improve soil fertility and productivity and the yield of black pepper sustainably.
Kevin Muyang Tawie Sulok; Osumanu Haruna Ahmed; Choy Yuen Khew; Jarroop Augustine Mercer Zehnder; Pei Sing Lai; Mohamadu Boyie Jalloh; Adiza Alhassan Musah; Azwan Awang; Arifin Abdu. Effects of Organic Amendments Produced from Agro-Wastes on Sandy Soil Properties and Black Pepper Morpho-Physiology and Yield. Agronomy 2021, 11, 1738 .
AMA StyleKevin Muyang Tawie Sulok, Osumanu Haruna Ahmed, Choy Yuen Khew, Jarroop Augustine Mercer Zehnder, Pei Sing Lai, Mohamadu Boyie Jalloh, Adiza Alhassan Musah, Azwan Awang, Arifin Abdu. Effects of Organic Amendments Produced from Agro-Wastes on Sandy Soil Properties and Black Pepper Morpho-Physiology and Yield. Agronomy. 2021; 11 (9):1738.
Chicago/Turabian StyleKevin Muyang Tawie Sulok; Osumanu Haruna Ahmed; Choy Yuen Khew; Jarroop Augustine Mercer Zehnder; Pei Sing Lai; Mohamadu Boyie Jalloh; Adiza Alhassan Musah; Azwan Awang; Arifin Abdu. 2021. "Effects of Organic Amendments Produced from Agro-Wastes on Sandy Soil Properties and Black Pepper Morpho-Physiology and Yield." Agronomy 11, no. 9: 1738.
Inappropriate drainage and agricultural development on tropical peatland may lead to an increase in methane (CH4) emission, thus expediting the rate of global warming and climate change. It was hypothesized that water table fluctuation affects CH4 emission in pineapple cultivation on tropical peat soils. The objectives of this study were to: (i) quantify CH4 emission from a tropical peat soil cultivated with pineapple and (ii) determine the effects of water table depth on CH4 emission from a peat soil under simulated water table fluctuation. Soil CH4 emissions from an open field pineapple cultivation system and field lysimeters were determined using the closed chamber method. High-density polyethylene field lysimeters were set up to simulate the natural condition of cultivated drained peat soils under different water table fluctuations. The soil CH4 flux was measured at five time intervals to obtain a 24 h CH4 emission in the dry and wet seasons during low- and high-water tables. Soil CH4 emissions from open field pineapple cultivation were significantly lower compared with field lysimeters under simulated water table fluctuation. Soil CH4 emissions throughout the dry and wet seasons irrespective of water table fluctuation were not affected by soil temperature but emissions were influenced by the balance between methanogenic and methanotrophic microorganisms controlling CH4 production and consumption, CH4 transportation through molecular diffusion via peat pore spaces, and non-microbial CH4 production in peat soils. Findings from the study suggest that water table fluctuation at the soil–water interface relatively controls the soil CH4 emission from lysimeters under simulated low- and high-water table fluctuation. The findings of this study provide an understanding of the effects of water table fluctuation on CH4 emission in a tropical peatland cultivated with pineapple.
Wendy Luta; Osumanu Ahmed; Latifah Omar; Roland Heng; Liza Choo; Mohamadu Jalloh; Adiza Musah; Arifin Abdu. Water Table Fluctuation and Methane Emission in Pineapples (Ananas comosus (L.) Merr.) Cultivated on a Tropical Peatland. Agronomy 2021, 11, 1448 .
AMA StyleWendy Luta, Osumanu Ahmed, Latifah Omar, Roland Heng, Liza Choo, Mohamadu Jalloh, Adiza Musah, Arifin Abdu. Water Table Fluctuation and Methane Emission in Pineapples (Ananas comosus (L.) Merr.) Cultivated on a Tropical Peatland. Agronomy. 2021; 11 (8):1448.
Chicago/Turabian StyleWendy Luta; Osumanu Ahmed; Latifah Omar; Roland Heng; Liza Choo; Mohamadu Jalloh; Adiza Musah; Arifin Abdu. 2021. "Water Table Fluctuation and Methane Emission in Pineapples (Ananas comosus (L.) Merr.) Cultivated on a Tropical Peatland." Agronomy 11, no. 8: 1448.
This review provides an updated and comprehensive overview on the ethnomedicinal use, phytochemistry, pharmacology, and toxicology of M. loriformis. Phytochemical analysis of M. loriformis revealed that it is composed of phenolics, flavonoids, condensed tannins, chlorophylls, alkaloids, and steroids. Numerous compounds including syringic acid, ß-O-D-glucopyranosyl-2-(2′-hydroxy-Z-6′-enecosamide) sphingosine, isovitexin, and 3β-O-D-glucopyranosyl-24ξ-ethylcholest-5-ene have been identified and isolated from this plant species. The present review attempts to bridge the gap between traditional use and pharmacological studies of M. loriformis while improving their existing therapeutic agents and product applications based on this plant.
Intan Soraya Che Sulaiman; Azham Mohamad; Osumanu Haruna Ahmed. Murdannia loriformis: A Review of Ethnomedicinal Uses, Phytochemistry, Pharmacology, Contemporary Application, and Toxicology. Evidence-Based Complementary and Alternative Medicine 2021, 2021, 1 -15.
AMA StyleIntan Soraya Che Sulaiman, Azham Mohamad, Osumanu Haruna Ahmed. Murdannia loriformis: A Review of Ethnomedicinal Uses, Phytochemistry, Pharmacology, Contemporary Application, and Toxicology. Evidence-Based Complementary and Alternative Medicine. 2021; 2021 ():1-15.
Chicago/Turabian StyleIntan Soraya Che Sulaiman; Azham Mohamad; Osumanu Haruna Ahmed. 2021. "Murdannia loriformis: A Review of Ethnomedicinal Uses, Phytochemistry, Pharmacology, Contemporary Application, and Toxicology." Evidence-Based Complementary and Alternative Medicine 2021, no. : 1-15.
Farming systems on peat soils are novel, considering the complexities of these organic soil. Since peat soils effectively capture greenhouse gases in their natural state, cultivating peat soils with annual or perennial crops such as pineapples necessitates the monitoring of nitrous oxide (N2O) emissions, especially from cultivated peat lands, due to a lack of data on N2O emissions. An on-farm experiment was carried out to determine the movement of N2O in pineapple production on peat soil. Additionally, the experiment was carried out to determine if the peat soil temperature and the N2O emissions were related. The chamber method was used to capture the N2O fluxes daily (for dry and wet seasons) after which gas chromatography was used to determine N2O followed by expressing the emission of this gas in t ha−1 yr−1. The movement of N2O horizontally (832 t N2O ha−1 yr−1) during the dry period was higher than in the wet period (599 t N2O ha−1 yr−1) because of C and N substrate in the peat soil, in addition to the fertilizer used in fertilizing the pineapple plants. The vertical movement of N2O (44 t N2O ha−1 yr−1) was higher in the dry season relative to N2O emission (38 t N2O ha−1 yr−1) during the wet season because of nitrification and denitrification of N fertilizer. The peat soil temperature did not affect the direction (horizontal and vertical) of the N2O emission, suggesting that these factors are not related. Therefore, it can be concluded that N2O movement in peat soils under pineapple cultivation on peat lands occurs horizontally and vertically, regardless of season, and there is a need to ensure minimum tilling of the cultivated peat soils to prevent them from being an N2O source instead of an N2O sink.
Alicia Jeffary; Osumanu Ahmed; Roland Heng; Liza Choo; Latifah Omar; Adiza Musah; Arifin Abdu. Nitrous Oxide Emissions in Pineapple Cultivation on a Tropical Peat Soil. Sustainability 2021, 13, 4928 .
AMA StyleAlicia Jeffary, Osumanu Ahmed, Roland Heng, Liza Choo, Latifah Omar, Adiza Musah, Arifin Abdu. Nitrous Oxide Emissions in Pineapple Cultivation on a Tropical Peat Soil. Sustainability. 2021; 13 (9):4928.
Chicago/Turabian StyleAlicia Jeffary; Osumanu Ahmed; Roland Heng; Liza Choo; Latifah Omar; Adiza Musah; Arifin Abdu. 2021. "Nitrous Oxide Emissions in Pineapple Cultivation on a Tropical Peat Soil." Sustainability 13, no. 9: 4928.
Sustaining soil health cannot be divorced from sustainable crop production. Organic, or natural, farming is being promoted as a good sustainable agriculture practice. One aspect of organic farming that could significantly enhance and sustain soil health, soil quality, and crop productivity is the use of high-quality soil conditioners or organic amendments produced from agro-wastes. Thus, the objective of this study was to characterize the chemical and biological properties of selected agro-wastes with potential for use as organic amendments in sustaining soil health. Standard procedures were used to produce and characterize the soil conditioners, namely fermented plant juice (FPJ), fermented fruit juice (FFJ), palm kernel shell (PKS) biochar, and kitchen waste (KW) compost. The fermented juices (FPJ and FFJ), PKS biochar, and KW compost exhibited chemical and biological properties with good potential as soil conditioners or organic amendments to sustain soil health. The fermented juices contained important microbes that can solubilize P and K in soil for crop use. The high pH and C content of the biochar and compost and the high cation exchange capacity of the biochar are good indicators of the potential of these materials to sustain soil health in terms of the liming effect of acid soils, nutrient and water retention, nutrient reserves, and a suitable habitat for microbial life. Moreover, the organic amendments contain reasonable amounts of macro- and micro-nutrients, which could be released to increase soil fertility. Despite these potential benefits, field application of these organic amendments is necessary to evaluate their effects on soil health and crop production in both the short and long term.
Kevin Sulok; Osumanu Ahmed; Choy Khew; Jarroop Zehnder; Mohamadu Jalloh; Adiza Musah; Arifin Abdu. Chemical and Biological Characteristics of Organic Amendments Produced from Selected Agro-Wastes with Potential for Sustaining Soil Health: A Laboratory Assessment. Sustainability 2021, 13, 4919 .
AMA StyleKevin Sulok, Osumanu Ahmed, Choy Khew, Jarroop Zehnder, Mohamadu Jalloh, Adiza Musah, Arifin Abdu. Chemical and Biological Characteristics of Organic Amendments Produced from Selected Agro-Wastes with Potential for Sustaining Soil Health: A Laboratory Assessment. Sustainability. 2021; 13 (9):4919.
Chicago/Turabian StyleKevin Sulok; Osumanu Ahmed; Choy Khew; Jarroop Zehnder; Mohamadu Jalloh; Adiza Musah; Arifin Abdu. 2021. "Chemical and Biological Characteristics of Organic Amendments Produced from Selected Agro-Wastes with Potential for Sustaining Soil Health: A Laboratory Assessment." Sustainability 13, no. 9: 4919.
Densification of ashy biochar into tablet can enhance the handling and conveyance efficiencies of biochar. It was hypothesized that fertilizer-embedded biochar tablets can slowly release embedded nutrients in synchrony with optimum nutrient uptake by crops. The objectives of this research were to determine the effects of biochar tablets with and without embedded fertilizer on soil chemical properties and nutrient use efficiency of Zea mays (sweet corn). The biochar tablet (BT) was produced by blending a biochar mixture with starch followed by densification using a single punch tablet press whereas the fertilizer embedded biochar tablet (BF) was prepared using the same procedure except that NPK fertilizer was added during blending. A pot experiment with five fertilization treatments including control was carried out in an open field located in Perlis, Malaysia. Co-application of biochar and fertilizer increased soil total carbon, nitrogen, but it reduced soil electrical conductivity (EC). Additionally, the BF significantly increased leaf chlorophyll content, dry root weight, and total plant nutrient use efficiency of sweet corn. The findings suggest that BF can serve as a slow release fertilizer to improve crop nutrient use efficiency. Therefore, embedding fertilizer in biochar tablets is recommended for sweet corn production following a long term field study to confirm the findings of this pot study.
Yit Lee; Osumanu Ahmed; Samsuri Wahid; Zakry AB Aziz. Biochar Tablets with and without Embedded Fertilizer on the Soil Chemical Characteristics and Nutrient Use Efficiency of Zea mays. Sustainability 2021, 13, 4878 .
AMA StyleYit Lee, Osumanu Ahmed, Samsuri Wahid, Zakry AB Aziz. Biochar Tablets with and without Embedded Fertilizer on the Soil Chemical Characteristics and Nutrient Use Efficiency of Zea mays. Sustainability. 2021; 13 (9):4878.
Chicago/Turabian StyleYit Lee; Osumanu Ahmed; Samsuri Wahid; Zakry AB Aziz. 2021. "Biochar Tablets with and without Embedded Fertilizer on the Soil Chemical Characteristics and Nutrient Use Efficiency of Zea mays." Sustainability 13, no. 9: 4878.
The physical and chemical properties of clinoptilolite zeolite can be used to enhance soil nutrient availability for optimum crop use. Amending nitrogen, phosphorus, and potassium fertilizers with clinoptilolite zeolite could create a pool of negative charges to retain and release nutrients timely for crop use. Thus, we used clinoptilolite zeolite to enhance Typic Paleudults sorption (adsorption and desorption) of nitrogen, phosphorus, potassium, and this soil’s pH buffering capacity. The treatments evaluated were: (i) 250 g soil alone, (ii) 20 g clinoptilolite zeolite alone, (iii) 250 g soil + 20 g clinoptilolite zeolite, (iv) 250 g soil + 40 g clinoptilolite zeolite, and (v) 250 g soil + 60 g clinoptilolite zeolite. Clinoptilolite zeolite increased soil nitrogen and potassium adsorption, nitrogen desorption, and soil pH. Moreover, ability of the soil to resist drastic change in pH (pH buffering capacity) was improved. Additionally, phosphorus adsorption and desorption of phosphorus and potassium were reduced. Higher potassium adsorption with lower potassium desorption suggests that the clinoptilolite zeolite sorbs potassium effectively. The clinoptilolite zeolite nitrogen, phosphorus, and potassium contributed to the reduction in the adsorption these nutrients. The clinoptilolite zeolite improved nitrogen, phosphorus, and potassium availability and soil buffering capacity to prevent these nutrients from being fixed or lost through for example, leaching. Therefore, clinoptilolite zeolite application could contribute to improved use of nitrogen, phosphorus, and potassium fertilizers to prevent soil, air, and water pollution. Additionally, our intervention could improve nitrogen, phosphorus, and potassium use efficiency.
Perumal Palanivell; Osumanu Ahmed; Latifah Omar; Nik Abdul Majid. Nitrogen, Phosphorus, and Potassium Adsorption and Desorption Improvement and Soil Buffering Capacity Using Clinoptilolite Zeolite. Agronomy 2021, 11, 379 .
AMA StylePerumal Palanivell, Osumanu Ahmed, Latifah Omar, Nik Abdul Majid. Nitrogen, Phosphorus, and Potassium Adsorption and Desorption Improvement and Soil Buffering Capacity Using Clinoptilolite Zeolite. Agronomy. 2021; 11 (2):379.
Chicago/Turabian StylePerumal Palanivell; Osumanu Ahmed; Latifah Omar; Nik Abdul Majid. 2021. "Nitrogen, Phosphorus, and Potassium Adsorption and Desorption Improvement and Soil Buffering Capacity Using Clinoptilolite Zeolite." Agronomy 11, no. 2: 379.
Using value-added products such as compost in farming systems could enable optimization of nitrogen (N) fertilizers whose world-wide demand is on the increase. The objectives of this study were to: (i) produce compost through co-composting rice husk (RH) with chicken dung slurry (CDS), chicken feed, and molasses, (ii) determine the effects of optimum rate of urea and RH compost on minimizing ammonia (NH3) volatilization, and (iii) determine total N, exchangeable ammonium (NH4 +), and available nitrate (NO3 −) retained in soil following co-application of urea and RH compost. Compost was produced for 60 days by mixing RH, CDS, chicken feed, and molasses at a ratio of 20:1:1:1. The color of RH compost was dark brown and had significant amounts of major nutrients such as N (1.15%), phosphorus (3101 mg kg−1), potassium (2038 mg kg−1), calcium (863 mg kg−1), magnesium (276 mg kg−1), organic matter (OM) (60.67%), organic carbon (35.17%), and humic acids (5.87%). The C/N ratio of the RH compost was 30. The electrical conductivity and pH of the RH compost were 2.79 µS cm−1 and 6.55, respectively, and they were not phytotoxic because paddy seeds were successfully germinated in all of the RH compost extractants. The high cation exchange capacity (CEC) of the RH compost (100.67 cmolc kg−1) at the end of composting was one of the determinant factors that controlled NH3 loss from urea. The effectiveness of the RH compost in minimizing urea-N loss was determined using a close-dynamic air flow system. The RH compost significantly minimized NH3 volatilization because of the high affinity of the RH compost for NH4 +. An attestation of this reaction was that the high negative charges due to high CEC and OM of the RH compost temporarily protected NH4 + from being transformed into NH3 gas. Further evidence is the higher soil total N and exchangeable NH4 + for the treatments with RH compost than with urea alone. High quality compost can be produced from RH to reduce urea-N from being lost from urea. For the optimum rate, co-application of 60 g RH compost and 2.9 g urea per trough is recommended to mitigate NH3 volatilization instead of the existing practice (7.3 g urea alone per trough).
Latifah Omar; Osumanu Ahmed; Mohamadu Boyie Jalloh; Nik Abdul Majid. Rice Husk Compost Production and Use in Mitigating Ammonia Volatilization from Urea. Sustainability 2021, 13, 1832 .
AMA StyleLatifah Omar, Osumanu Ahmed, Mohamadu Boyie Jalloh, Nik Abdul Majid. Rice Husk Compost Production and Use in Mitigating Ammonia Volatilization from Urea. Sustainability. 2021; 13 (4):1832.
Chicago/Turabian StyleLatifah Omar; Osumanu Ahmed; Mohamadu Boyie Jalloh; Nik Abdul Majid. 2021. "Rice Husk Compost Production and Use in Mitigating Ammonia Volatilization from Urea." Sustainability 13, no. 4: 1832.
Burning pineapple residues on peat soils before pineapple replanting raises concerns on hazards of peat fires. A study was conducted to determine whether ash produced from pineapple residues could be used to minimize carbon dioxide (CO2) and nitrous oxide (N2O) emissions in cultivated tropical peatlands. The effects of pineapple residue ash fertilization on CO2 and N2O emissions from a peat soil grown with pineapple were determined using closed chamber method with the following treatments: (i) 25, 50, 70, and 100% of the suggested rate of pineapple residue ash + NPK fertilizer, (ii) NPK fertilizer, and (iii) peat soil only. Soils treated with pineapple residue ash (25%) decreased CO2 and N2O emissions relative to soils without ash due to adsorption of organic compounds, ammonium, and nitrate ions onto the charged surface of ash through hydrogen bonding. The ability of the ash to maintain higher soil pH during pineapple growth primarily contributed to low CO2 and N2O emissions. Co-application of pineapple residue ash and compound NPK fertilizer also improves soil ammonium and nitrate availability, and fruit quality of pineapples. Compound NPK fertilizers can be amended with pineapple residue ash to minimize CO2 and N2O emissions without reducing peat soil and pineapple productivity.
Liza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed; Nik Muhamad Nik Majid; Zakry Fitri Abd Aziz. Pineapple Residue Ash Reduces Carbon Dioxide and Nitrous Oxide Emissions in Pineapple Cultivation on Tropical Peat Soils at Saratok, Malaysia. Sustainability 2021, 13, 1014 .
AMA StyleLiza Nuriati Lim Kim Choo, Osumanu Haruna Ahmed, Nik Muhamad Nik Majid, Zakry Fitri Abd Aziz. Pineapple Residue Ash Reduces Carbon Dioxide and Nitrous Oxide Emissions in Pineapple Cultivation on Tropical Peat Soils at Saratok, Malaysia. Sustainability. 2021; 13 (3):1014.
Chicago/Turabian StyleLiza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed; Nik Muhamad Nik Majid; Zakry Fitri Abd Aziz. 2021. "Pineapple Residue Ash Reduces Carbon Dioxide and Nitrous Oxide Emissions in Pineapple Cultivation on Tropical Peat Soils at Saratok, Malaysia." Sustainability 13, no. 3: 1014.
At present, there is little information on the effects of organic amendments on black pepper farms particularly in Sarawak, Malaysia. The objective was to study the effects of organic amendments on selected soil properties, morphological characteristics, and yield of immature vines and its economic viability on immature pepper productions. There were five treatments each replicated five times in a randomized complete block design. Treatments were (i) F0—NPK 15:15:15 compound fertilizers, (ii) F1—fermented plant juice (FPJ), (iii) F2—FPJ incorporated with biochar, and compost, (iv) F3—fermented fruit juice (FFJ), and (v) F4—FFJ incorporated with biochar, and compost. The soil organic amendments which were consisted of fermented juices, biochar, and compost have positively improved soil bulk density, soil porosity, pH, CEC, TOC, C/N ratio, available P, exchangeable Ca, soil respiration, and soil microorganism count (bacteria, actinomycetes, and fungi). The fermented juices only or fermented juices with biochar and compost had lower effect on LAI and fruit spike length. The effect of soil organic amendments on fresh berry yield was comparable to that of NPK fertilizer. The economic viability study showed that the organic approach was comparable to the conventional NPK fertilization program. Through the interaction of beneficial microorganisms, biochar, and compost, introducing organic amendments in immature pepper cultivation is a reasonable option due to its contribution to yield that can lead to income sustainability for farmers.
Kevin Muyang Tawie Sulok; Osumanu Haruna Ahmed; Choy Yuen Khew; Pei Sing Lai; Jarroop Augustine Mercer Zehnder; Mohd Effendi Wasli; Zakry Fitri Ab Aziz. Use of organic soil amendments to improve soil health and yield of immature pepper (Piper nigrum L.). Organic Agriculture 2021, 11, 145 -161.
AMA StyleKevin Muyang Tawie Sulok, Osumanu Haruna Ahmed, Choy Yuen Khew, Pei Sing Lai, Jarroop Augustine Mercer Zehnder, Mohd Effendi Wasli, Zakry Fitri Ab Aziz. Use of organic soil amendments to improve soil health and yield of immature pepper (Piper nigrum L.). Organic Agriculture. 2021; 11 (1):145-161.
Chicago/Turabian StyleKevin Muyang Tawie Sulok; Osumanu Haruna Ahmed; Choy Yuen Khew; Pei Sing Lai; Jarroop Augustine Mercer Zehnder; Mohd Effendi Wasli; Zakry Fitri Ab Aziz. 2021. "Use of organic soil amendments to improve soil health and yield of immature pepper (Piper nigrum L.)." Organic Agriculture 11, no. 1: 145-161.
Papaya cultivation on nutrient deficient acidic peat soils causes poor growth, yield, and fruit quality of this crop. Alkalinity and the high affinity of clinoptilolite zeolite (CZ) for macronutrients could improve pH, nutrient availability, and papaya productivity on peat soils. A one-year field experiment was conducted to determine the effects of CZ on: (i) soil ammonium, nitrate, P, and K, and (ii) growth, yield, and fruit quality of papaya grown on a peat soil. Treatments evaluated were: (i) different amounts of CZ (25%, 50%, 70%, and 100% of the existing recommended rate of CZ) + NPK fertilizer, and (ii) NPK fertilizer alone. The peat soils with CZ improved pH, ammonium, nitrate, P, and K availability because of the sorption of these nutrients within the structured framework of the CZ. Co-applying CZ (70% to 100%) and NPK fertilizers improved the NPK contents in papaya leaves and the growth, yield, and fruit quality of papaya because of the significant availability of ammonium, nitrate, P, and K in the peat soil for their optimum uptake by the papaya plants. Ability of CZ to buffer the soil pH reduced the need for liming. It is possible to use CZ to improve papaya productivity because CZ can regulate nutrient availability.
Liza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed; Shaidatul Azdawiyah Abdul Talib; Mohamad Zabawi Abdul Ghani; Shamsiah Sekot. Clinoptilolite Zeolite on Tropical Peat Soils Nutrient, Growth, Fruit Quality, and Yield of Carica papaya L. cv. Sekaki. Agronomy 2020, 10, 1320 .
AMA StyleLiza Nuriati Lim Kim Choo, Osumanu Haruna Ahmed, Shaidatul Azdawiyah Abdul Talib, Mohamad Zabawi Abdul Ghani, Shamsiah Sekot. Clinoptilolite Zeolite on Tropical Peat Soils Nutrient, Growth, Fruit Quality, and Yield of Carica papaya L. cv. Sekaki. Agronomy. 2020; 10 (9):1320.
Chicago/Turabian StyleLiza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed; Shaidatul Azdawiyah Abdul Talib; Mohamad Zabawi Abdul Ghani; Shamsiah Sekot. 2020. "Clinoptilolite Zeolite on Tropical Peat Soils Nutrient, Growth, Fruit Quality, and Yield of Carica papaya L. cv. Sekaki." Agronomy 10, no. 9: 1320.
Sugarcane is an important industrial crop because it is the major source of white sugar. It is also one of the crops for the alcohol and biofuel industries. Disease-causing organisms can significantly decrease the productivity of sugarcane plants and sugar quality. Among the disease-causing organisms, Colletotrichum falcatum Went causes the most significant economic loss (5–50%) in the sugarcane production due to red rot disease. This loss results in only 31% sugar recovery. It is reported that C. falcatum can kill sugarcane plants. Currently, there is no sustainable way of preventing red rot disease from spreading in sugarcane plantations. Many popular sugarcane varieties are no longer used in sugarcane cultivation because of their susceptibility to C. falcatum. The objectives of this manuscript were to: (i) summarize existing approaches for the early detection of red rot disease and controlling techniques of red rot disease in the field and laboratory and (ii) assess red rot disease control effectiveness so as to propose better methods for mitigating the spread C. falcatum. If our proposition is adopted or practiced, it could significantly contribute to the mitigation of C. falcatum infection in the sugarcane industry. This could enable achieving sustainable cultivation of sugarcanes to guarantee the sustainability of the sugar industry in the tropics and the subtropics.
Imam Hossain; Khairulmazmi Ahmad; Yasmeen Siddiqui; Norsazilawati Saad; Ziaur Rahman; Ahmed Osumanu Haruna; Siti Khairunniza Bejo. Current and Prospective Strategies on Detecting and Managing Colletotrichumfalcatum Causing Red Rot of Sugarcane. Agronomy 2020, 10, 1253 .
AMA StyleImam Hossain, Khairulmazmi Ahmad, Yasmeen Siddiqui, Norsazilawati Saad, Ziaur Rahman, Ahmed Osumanu Haruna, Siti Khairunniza Bejo. Current and Prospective Strategies on Detecting and Managing Colletotrichumfalcatum Causing Red Rot of Sugarcane. Agronomy. 2020; 10 (9):1253.
Chicago/Turabian StyleImam Hossain; Khairulmazmi Ahmad; Yasmeen Siddiqui; Norsazilawati Saad; Ziaur Rahman; Ahmed Osumanu Haruna; Siti Khairunniza Bejo. 2020. "Current and Prospective Strategies on Detecting and Managing Colletotrichumfalcatum Causing Red Rot of Sugarcane." Agronomy 10, no. 9: 1253.
High nitrogen use efficiency (NUE) is important for improving crop yield. There are many nitrogen (N) fractions in soil and their uptake by crops varies. Most of the N that is taken up by plants is not native to the soil but usually from fertilizer added to the soil. However, the unbalanced use of fertilizers is currently an important issue that needs to be addressed. The objectives of this work were to determine the effects of using the recommended chemical fertilizers together with inorganic and organic amendments on (i) soil organic and inorganic N fractions, (ii) N uptake and use efficiency, and (iii) maize (Zea mays L) dry matter production and ear yield. A randomized complete block design field trial, using maize as a test crop, was done with seven fertilizer treatments, each replicated thrice for two crop cycles. The treatments included different combinations of urea N, clinoptilolite zeolite (CZ), rice straw compost, and paddy husk compost. The variables of the study were soil N fractions, ear yield, and N use efficiency. Generally, the combined use of the recommended chemical fertilizers with CZ and organic amendments resulted in significantly higher soil N fractions, N use efficiency, and ear yield of maize for both crops. The two treatments with a 50% reduction in recommended chemical fertilizers, CZ, and rice straw compost or paddy husk compost (treatments four and six) are recommended instead of the 100% recommended chemical fertilizer treatment (treatment one). The organic materials used for these two treatments are abundantly available and will reduce the economic and environmental costs of applying large quantities of chemical fertilizers alone.
Latifah Omar; Osumanu Haruna Ahmed; Mohamadu Boyie Jalloh; Abdul Majid Nik Muhamad; Mohamadu Boyie Jalloh. Soil Nitrogen Fractions, Nitrogen Use Efficiency and Yield of Zea mays L. Grown on a Tropical Acid Soil Treated with Composts and Clinoptilolite Zeolite. Applied Sciences 2020, 10, 1 .
AMA StyleLatifah Omar, Osumanu Haruna Ahmed, Mohamadu Boyie Jalloh, Abdul Majid Nik Muhamad, Mohamadu Boyie Jalloh. Soil Nitrogen Fractions, Nitrogen Use Efficiency and Yield of Zea mays L. Grown on a Tropical Acid Soil Treated with Composts and Clinoptilolite Zeolite. Applied Sciences. 2020; 10 (12):1.
Chicago/Turabian StyleLatifah Omar; Osumanu Haruna Ahmed; Mohamadu Boyie Jalloh; Abdul Majid Nik Muhamad; Mohamadu Boyie Jalloh. 2020. "Soil Nitrogen Fractions, Nitrogen Use Efficiency and Yield of Zea mays L. Grown on a Tropical Acid Soil Treated with Composts and Clinoptilolite Zeolite." Applied Sciences 10, no. 12: 1.
Plant growth-promoting rhizobacteria (PGPR), which include isolates from genera Paraburkholderia, Burkholderia and Serratia, have received attention due to their numerous plant growth-promoting mechanisms such as their ability to solubilize insoluble phosphates and nitrogen-fixation. However, there is a dearth of information on the potential plant growth-promoting effects of these three groups of bacteria on non-legumes such as maize. This study determined the influences of the aforementioned strains on soil properties, maize growth, nutrient uptake and nutrient use efficiency. A pot trial using maize as a test crop was done using a randomized complete block design with 7 treatments each replicated 7 times. The treatments used in this study were: Control (no fertilizer), chemical fertilizer (CF), organic-chemical fertilizers combination without inoculum (OCF) and with inocula consisting of single strains [cellulolytic bacteria (TC), organic fertilizer and chemical fertilizer with N-fixing bacteria (TN), organic fertilizer and chemical fertilizer with P-solubilizing bacteria (TP)) and three-strain inocula (TCNP), respectively. The variables measured included plant growth and nutrient content, soil nutrient content and functional rhizospheric bacterial populations. Paraburkholderia nodosa NB1 and Burkholderia cepacia PB3 showed comparable effects on maize biomass and also improved N and P use efficiencies when compared to full chemical fertilization. Nitrogen-fixing rhizobacteria had a positive effect on above-ground biomass of maize. Paraburkholderia nodosa NB1 improved soil total C and organic matter contents, besides being the only bacterial treatment that improved K use efficiency compared to OCF. The results suggest that P. nodosa NB1 and B. cepacia PB3 have potential usage in bio-fertilizers. In contrast, treatments with Serratia nematodiphila C46d and consortium strains showed poorer maize nutrient uptake and use efficiency than the other single strain treatments. Bacterial treatments generally showed comparable or higher overall N and P use efficiencies than full chemical fertilization. These findings suggest that at least half the amounts of N and P fertilizers could be reduced through the use of combined fertilization together with beneficial bacteria.
Amelia Tang; Ahmed Osumanu Haruna; Nik Muhamad Ab. Majid; Mohamadu Boyie Jalloh; Mohamadu Boyie Jalloh. Effects of Selected Functional Bacteria on Maize Growth and Nutrient Use Efficiency. Microorganisms 2020, 8, 854 .
AMA StyleAmelia Tang, Ahmed Osumanu Haruna, Nik Muhamad Ab. Majid, Mohamadu Boyie Jalloh, Mohamadu Boyie Jalloh. Effects of Selected Functional Bacteria on Maize Growth and Nutrient Use Efficiency. Microorganisms. 2020; 8 (6):854.
Chicago/Turabian StyleAmelia Tang; Ahmed Osumanu Haruna; Nik Muhamad Ab. Majid; Mohamadu Boyie Jalloh; Mohamadu Boyie Jalloh. 2020. "Effects of Selected Functional Bacteria on Maize Growth and Nutrient Use Efficiency." Microorganisms 8, no. 6: 854.
In the midst of the major soil degradation and erosion faced by tropical ecosystems, rehabilitated forests are being established to avoid the further deterioration of forest lands. In this context, cellulolytic, nitrogen-fixing (N-fixing), phosphate-solubilizing bacteria are very important functional groups in regulating the elemental cycle and plant nutrition, hence replenishing the nutrient content in forest soils. As is the case for other potential plant growth-promoting (PGP) rhizobacteria, these functional bacteria could have cross-functional abilities or beneficial traits that are essential for plants and can improve their growth. This study was conducted to isolate, identify, and characterize selected PGP properties of these three functional groups of bacteria from tropical rehabilitated forest soils at Universiti Putra Malaysia Bintulu Sarawak Campus, Malaysia. The bacteria were isolated based on their colonial growth on respective functional media, identified using both molecular and selected biochemical properties, and were assessed for their functional quantitative activities as well as PGP properties based on seed germination tests and indole-3-acetic acid (IAA) production. Out of the 15 identified bacterial isolates that exhibited beneficial phenotypic traits, a third belong to the genus Burkholderia and a fifth to Stenotrophomonas sp., with both genera consisting of members from two different functional groups. The results of the experiments confirm the multiple PGP traits of some selected bacterial isolates based on their respective high functional activities, root and shoot lengths, and seedling vigor improvements when bacterized on mung bean seeds, as well as significant IAA production. The results of this study suggest that these functional bacterial strains could potentially be included in bio-fertilizer formulations for crop growth on acid soils.
Amelia Tang; Ahmed Osumanu Haruna; Nik Muhamad Ab. Majid; Mohamadu Boyie Jalloh. Potential PGPR Properties of Cellulolytic, Nitrogen-Fixing, Phosphate-Solubilizing Bacteria in Rehabilitated Tropical Forest Soil. Microorganisms 2020, 8, 442 .
AMA StyleAmelia Tang, Ahmed Osumanu Haruna, Nik Muhamad Ab. Majid, Mohamadu Boyie Jalloh. Potential PGPR Properties of Cellulolytic, Nitrogen-Fixing, Phosphate-Solubilizing Bacteria in Rehabilitated Tropical Forest Soil. Microorganisms. 2020; 8 (3):442.
Chicago/Turabian StyleAmelia Tang; Ahmed Osumanu Haruna; Nik Muhamad Ab. Majid; Mohamadu Boyie Jalloh. 2020. "Potential PGPR Properties of Cellulolytic, Nitrogen-Fixing, Phosphate-Solubilizing Bacteria in Rehabilitated Tropical Forest Soil." Microorganisms 8, no. 3: 442.
Adsorption and desorption of nitrogen (N), phosphorus (P), and potassium (K) soils are controlled by pH, pH buffering capacity, organic matter, and cation exchange capacity (CEC). These factors optimized to improve timely availability of N, P, and K crop use using organic amendments such as chicken litter biochar (CLB). The objective of this study was to determine the effects of CLB on N, P, K sorption and pH buffering capacity of an acid soil. Different rates of CLB were mixed with an acid soil for N, P, and K sorption and pH buffering capacity determination. The CLB increased soil pH and pH buffering capacity, but unlike P and K adsorption, the different rates of CLB significantly increased N adsorption, suggesting that this soil amendment has high affinity for N than P and K. Also, because CLB reduced N, P, and K desorption, it suggests that N in particular will be slowly released with time. The reduced N desorption but higher N adsorption further indicates that N can be temporary fixed by CLB. This work has revealed CLB is more effective controlling soil N availability for timely crop use to avoid losses.
Perumal Palanivell; Osumanu Haruna Ahmed; Omar Latifah; Nik Muhamad Abdul Majid. Adsorption and Desorption of Nitrogen, Phosphorus, Potassium, and Soil Buffering Capacity Following Application of Chicken Litter Biochar to an Acid Soil. Applied Sciences 2019, 10, 295 .
AMA StylePerumal Palanivell, Osumanu Haruna Ahmed, Omar Latifah, Nik Muhamad Abdul Majid. Adsorption and Desorption of Nitrogen, Phosphorus, Potassium, and Soil Buffering Capacity Following Application of Chicken Litter Biochar to an Acid Soil. Applied Sciences. 2019; 10 (1):295.
Chicago/Turabian StylePerumal Palanivell; Osumanu Haruna Ahmed; Omar Latifah; Nik Muhamad Abdul Majid. 2019. "Adsorption and Desorption of Nitrogen, Phosphorus, Potassium, and Soil Buffering Capacity Following Application of Chicken Litter Biochar to an Acid Soil." Applied Sciences 10, no. 1: 295.
Application of urea in lowland rice fields leads to ammonia (NH3) volatilization and environmental pollution, and diminishes nitrogen recovery by rice (Oryza sativa L.). Amending urea with biochar could reduce NH3 loss from urea as well as improve chemical properties of acid soils. An incubation study was conducted using a closed-dynamic air flow system to determine NH3 volatilization from urea and chemical properties of an acid soil (Typic Paleudults). The soil was mixed with three rates of chicken litter biochar (20, 40, and 60 g pot−1) and 1.31 g urea. Mixing an acid soil with biochar (60 g pot−1) in waterlogged to stimulate conditions in paddy condition significantly reduced NH3 loss and total titratable acidity. Biochar application also increased soil pH, total nitrogen, available nitrate, organic matter, total organic carbon, total carbon, available phosphorus, and exchangeable cations. Thus, chicken litter biochar can be used to reduce urea-N loss and ameliorate chemical properties of acid soils. This aspect is being embarked on in our on-going field experiments.
Perumal Palanivell; Osumanu Haruna Ahmed; Nik Muhamad Ab Majid. Minimizing Ammonia Volatilization from Urea in Waterlogged Condition Using Chicken Litter Biochar. Communications in Soil Science and Plant Analysis 2017, 48, 2083 -2092.
AMA StylePerumal Palanivell, Osumanu Haruna Ahmed, Nik Muhamad Ab Majid. Minimizing Ammonia Volatilization from Urea in Waterlogged Condition Using Chicken Litter Biochar. Communications in Soil Science and Plant Analysis. 2017; 48 (17):2083-2092.
Chicago/Turabian StylePerumal Palanivell; Osumanu Haruna Ahmed; Nik Muhamad Ab Majid. 2017. "Minimizing Ammonia Volatilization from Urea in Waterlogged Condition Using Chicken Litter Biochar." Communications in Soil Science and Plant Analysis 48, no. 17: 2083-2092.
Information on methane emission in pineapple cultivation on peatlands is scarce. Methane emission in pineapple cultivation is important as 90% of pineapples are grown on the peat soils of Malaysia. It is essential to determine methane emission in pineapple cultivation because pineapples are Crassulacean acid metabolism plants whose effects on methane could be different from other crops grown on tropical peat soils. Methane emissions from root respiration, microbial respiration, and oxidative peat decomposition were determined in a lysimeter experiment. There were three treatments: peat soil cultivated with pineapple, bare peat soil, and bare peat soil fumigated with chloroform. Methane emissions from peat soil cultivated with pineapple, bare peat soil, and bare peat soil fumigated with chloroform were 0.65 t/ha/yr, 0.75 t/ha/yr, and 0.75 t/ha/yr, respectively. The lower methane emissions are consistent with the general believe that methane emission from cultivated peat soils is lower than those of anaerobic or water logged peat soils. Soil methane emission was affected by nitrogen fertilization under pineapple cultivation but the converse was true for soil temperature nor soil moisture.
Liza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed. Methane Emission from Pineapple Cultivation on a Tropical Peatland at Saratok, Malaysia. Sustainable Agriculture Research 2017, 6, 64 .
AMA StyleLiza Nuriati Lim Kim Choo, Osumanu Haruna Ahmed. Methane Emission from Pineapple Cultivation on a Tropical Peatland at Saratok, Malaysia. Sustainable Agriculture Research. 2017; 6 (3):64.
Chicago/Turabian StyleLiza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed. 2017. "Methane Emission from Pineapple Cultivation on a Tropical Peatland at Saratok, Malaysia." Sustainable Agriculture Research 6, no. 3: 64.
Draining of peatland for agriculture could affect the release of nitrous oxide into the atmosphere. Presently, there is dearth of information on soil nitrous oxide emission from tropical peat soils cultivated with pineapples. Lysimeter and closed chamber methods were used to quantify nitrous oxide emission from root respiration, microbial respiration, and oxidative peat decomposition under controlled water table condition. Treatments evaluated were: peat soil grown with pineapple, uncultivated peat soils, and bare peat soil fumigated with chloroform. Cultivation of Moris pineapple on drained peat soils resulted in the higher release of nitrous oxide emission (15.7 t N2O ha/yr), followed by fumigated peat soil with chloroform (14.3 t N2O ha/yr), and uncultivated peat soil (10.2 t N2O ha/yr). Soil nitrous oxide emission was affected by nitrate fertilization but emission was not affected by soil temperature nor soil moisture.
Liza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed. Nitrous Oxide Emission of a Tropical Peat Soil Grown with Pineapple at Saratok, Malaysia. Sustainable Agriculture Research 2017, 6, 75 .
AMA StyleLiza Nuriati Lim Kim Choo, Osumanu Haruna Ahmed. Nitrous Oxide Emission of a Tropical Peat Soil Grown with Pineapple at Saratok, Malaysia. Sustainable Agriculture Research. 2017; 6 (3):75.
Chicago/Turabian StyleLiza Nuriati Lim Kim Choo; Osumanu Haruna Ahmed. 2017. "Nitrous Oxide Emission of a Tropical Peat Soil Grown with Pineapple at Saratok, Malaysia." Sustainable Agriculture Research 6, no. 3: 75.
Roland Jui Heng Kueh; Nik Muhamad Majid; Osumanu Haruna Ahmed; Seca Gandaseca. Assessment of Carbon Stock in Chronosequence Rehabilitated Tropical Forest Stands in Malaysia. Journal of Forest and Environmental Science 2016, 32, 302 -310.
AMA StyleRoland Jui Heng Kueh, Nik Muhamad Majid, Osumanu Haruna Ahmed, Seca Gandaseca. Assessment of Carbon Stock in Chronosequence Rehabilitated Tropical Forest Stands in Malaysia. Journal of Forest and Environmental Science. 2016; 32 (3):302-310.
Chicago/Turabian StyleRoland Jui Heng Kueh; Nik Muhamad Majid; Osumanu Haruna Ahmed; Seca Gandaseca. 2016. "Assessment of Carbon Stock in Chronosequence Rehabilitated Tropical Forest Stands in Malaysia." Journal of Forest and Environmental Science 32, no. 3: 302-310.